S-90949A228 3/8"-16 Flange Nuts

Key Features & Benefits at a Glance

• Secure vibration-resistant locking through distorted thread design that maintains clamp load in high-vibration environments
• Enhanced load distribution with 13/16" flange diameter that reduces surface pressure and prevents damage to mating surfaces
• Superior corrosion resistance with black-oxide steel finish providing durable protection in industrial conditions
• High-strength performance with Grade G classification ensuring reliable performance in demanding applications
• Easy installation and removal with standard external hex drive and coarse UNC threading for efficient assembly
• Precise thread engagement with Class 2B fit ensuring consistent performance and compatibility with standard bolts
• Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe industrial use

Professional Applications & Engineering Value

This Grade G flange lock nut with distorted thread locking technology addresses critical challenges in industrial assembly where vibration-induced loosening compromises safety and performance. The black-oxide steel construction provides exceptional durability against corrosion while maintaining the Grade G strength rating for heavy-duty applications. The integrated 13/16" flange eliminates the need for separate washers, distributing clamp load evenly across surfaces and preventing material deformation. With UNC coarse threading (3/8"-16) and Class 2B thread fit, this external hex nut ensures quick installation and reliable performance in automotive, machinery, construction, and manufacturing equipment where right-hand threading is standard. The combination of mechanical locking and environmental compliance makes it ideal for OEM and MRO applications requiring long-term reliability.

Specification Summary & Compliance

This flange lock nut features Class 2B thread fit per UNC standards with 3/8"-16 coarse threading and right-hand direction. Manufacturing complies with Grade G strength classification requirements. The product is fully REACH (EC 1907/2006) compliant and meets RoHS 3 (2015/863/EU) directives for environmental safety. Dimensions include 13/16" flange diameter, 9/16" width, and 27/64" height with standard hex profile for universal tool compatibility.